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IPv6

SOWN has global IPv6 addressing provided by the University of Southampton. In March 2016, IPv6 officially superseded IPv4 with the latter being declared "Historic". IPv6 is required for continued global unique addressing, as officially top-level address space for IPv4 ran out at the end of January 2011. SOWN has a /56 IPv6 prefix which represents approximately 3^20 unique addresses or 256 /64 networks or nodes.

Address Space

Allocations

Routing

Sown-gw is the gateway server for the SOWN network. It sits between the SOWN network and forwards IPv6 (and IPv4) traffic between SOWN and the rest of the Internet. Although SOWN allocates addresses from the whole 2001:630:d0:f700::/56 IPv6 range, only the 2001:630:d0:f700::/64 is currently (statically) routed down to SOWN from the University of Southampton's network. It is planned that the whole 2001:630:d0:f700::/56 will be statically routed to the SOWN network by late 2017 / early 2018.

Firewalling

To ensure SOWN's network is firewalled from the Internet on IPv6. The IPv6 firewall is deployed along with its Iv4 counterpart using /etc/init.d/firewall on [[Sown-gw][. The following firewall configuration (/etc/default/firewall6) is deployed by this script:

OpenVPN

OpenVPN will be used to route IPv6 subnets to SOWN(at)Home nodes connected to the network. Currently, the SOWN's standalone IPv6 tunnelbroker provides a similar service but is not integrated into the SOWN(at)Home firmware and admin system. Its features are being integrated into SOWN's new OpenVPN server on Sown-vpn2.

Multicast

Sown-gw will be configured to become the IPv6 multicast router for SOWN.

Packages Required

The following packages will probably be needed to allow Sown-gw to talk to the ford.6core ECS's IPv6 core router.

pimd

mrd6

No other configuration should be required at this stage. However, some packages may need to be to use eth1 as the default multicast route/interface. Although this really shouldn't be required.